At the moment I can only store just over 400 messages in my phone before saying "memory full, delete messages" (or something along those lines!), but when I go to look at the phone memory (shown as a pie chart), hardly any of the memory is used up. How do I change the settings so that more of my phone memory can be used to store messages instead of it being pointless waiting for calender events, contacts etc...? If there is a way...? 